Login
Home
TOP
Send feedback
Login
Subjects
Physics CBSE Live product
Class 7 (2026-27)
Changes around us: Physical and Chemical
Understanding Physical and Chemical Changes
1.
Identify the reason of the change
Question:
2
m.
Read each situation carefully. Choose the option that best explains why the change is classified as a physical or chemical change:
1.
Burning paper is a chemical change because
The paper changes its shape.
The paper becomes smaller.
The paper becomes hot.
A new substance like ash and gases is formed.
2.
Milk turns into curd because
Bacteria produce new substances that change the properties of milk.
Milk simply becomes thicker.
Only the state changes.
The colour changes only.
Login
or
Fast registration
Previous theory
Exit to the topic
Next task
Send feedback
Did you find an error?
Send it to us!
